[Feature] time sync - remove fabric table delegate on shutdown

[cecille]

Feature description

...
see title, #28011 (comment)

Platform

core

Platform Version(s)

No response

Anything else?

No response

[cecille]

The interesting thing here is that we don't have a global shutdown event - we seem to handle removals kind of add-hoc in the server layer, which doesn't work for cluster impls since we're not guaranteed to have them.

Removing this in the destructor is a dodgy proposition because I'm pretty sure that the destructor for statically allocated objects happens after we've de-initialized the memory controller. We could add a shutdown event, but there's a bit of a chicken and egg there for removing platform event handlers. I suppose we could do that in the server code though (global fire sale - everything goes)